Harduinia mortonis, echnoid test with circular outline
Bob Campbell Geology Museum Formation: Peedee Formation.
Sea Urchin (Hardounia cf. florealis)
Bob Campbell Geology Museum 72 million years old; Donated: The Duncan Family.
Ammonite (Mortaniceras equidistans)
Bob Campbell Geology Museum 100 million years old; Formation: Duck Creek Limestone; Donated: Mr. and Mrs. Alvin Gosnell.
Nautiloid (Eutrephoceras dekayi)
Bob Campbell Geology Museum 70 million years old; Formation: Pierre Shale.
Ostracode, limestone packed with disarticulated ostracodes
Bob Campbell Geology Museum Formation: Lukota Formation; Chilson mem.
Trace fossil burrows and tracks,siltstone with preserved trackways and burrows
Bob Campbell Geology Museum Formation: Full River Formation.
Ammonite (Rhaeboceras sp.)
Bob Campbell Geology Museum 69 million years old; Formation: Bearpaw Shale.